Azir or Zed?

Dear readers, I do not know who to main for mid lane ^^ I want to main someone that can carry and is mobile and mechanically difficult to play. For example, the riven or irelia is for top lane, rengar for jungle, thresh for supp and vayne for adc. But idk who that type of champ is for mid, i love zed and azir although i want to practice one. I do not care how hard any of the champions is i am willing to play as many games to master the champion. I am gold V right now but i wanna master someone that i can also play in diamond. I would also love pros and cons about both champions and who is better to carry with for solo q :)
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